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<h2>Databases</h2>

<p>A database consists of two files:</p>
<ul>
<li><p>A <u>logK-file</u> includes stoichiometry and <nobr>log<i>K</i>&deg;</nobr>
values for reactions.</p></li>

<li><p>An <u>elements-file</u> has information on which components should be
	listed under a given chemical element.</p>
  <p style="line-height:2.5ex; margin-top:0.4ex; margin-bottom:0; text-indent:0;">
  For example, if the ligand <i>glycinate</i> is added to the database,
	the DATABASE program has no way of knowing that it should be listed under <i>carbon</i>.
  This information is given in the element-file.</li>

</ul>

<p><b>Which databases?</b> Any number of databases may be read by the DATABASE program.
Use the pull-down menu &#147;Options / Data / <nobr>Database&nbsp;files&#148;</nobr> to add or
remove databases.</p>

<p>The <i>binary</i> database supplied with &ldquo;Chemical Equilibrium Software&rdquo; consists of files
<nobr>&#147;<tt>Reactions.elb</tt>&#148;</nobr> and
<nobr>&#147;<tt>Reactions.db</tt>&#148;.</nobr> They can not be changed.</p>

<p><b>What Order?</b> The order in which the databases will be searched can be changed
using the pull-down menu &#147;Options / Data / <nobr>Database&nbsp;files&#148;</nobr> of  DATABASE.
The order is important because for two species with the same name
(but different logK value), only the last one will be retained,
see <a href="DB_Remove_change_data.htm"><b>Removing or Changing data.</b></a></p>

<p><a href="DB_Add_data.htm"><b>Adding Data with DATABASE</b></a></p>

<p><a href="DB_Create_your_database.htm"><b>Create your own databases</b></a></p>

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